Numerical Simulation of Shock Wave Effect on Damaged Upper and Lower Adjacent Structures of Ships

doi:10.16182/j.issn1004731x.joss.201812036

Abstract

Abstract: The damage effect of shock wave on the upper and lower adjacent cabin structure of small warship is studied. LS-DYNA finite element analysis software is used. Damage modes of upper and lower adjacent cabin structures under dynamic and static explosion are analyzed. Cabin damage under different charging speeds is calculated. The results show that in the dynamic explosion state, there is a big difference between the shock wave field and the static explosion, which causes different modes of bulkhead damage. When the explosive happens in the lower cabin, the upper cabin bulkhead is extruded by the deformation of the roof of the lower cabin, resulting in large deformation in roof. Although the dynamic explosion can cause more serious damage to the bulkhead in the direction of moving speed, the pressure relief speed is accelerated, the quasi static pressure in the cabin decreases, and the damage degree in the negative direction of the motion is reduced. In general, it is not conducive to the damage of the ship cabin.

Key words: shock, damage effect, combined cabin, dynamic explosion

CLC Number:

U663.2

Miao Run, Wang Weili, Liu Hongjie, Wu Shiyong, Zeng Liang. Numerical Simulation of Shock Wave Effect on Damaged Upper and Lower Adjacent Structures of Ships[J]. Journal of System Simulation, 2018, 30(12): 4778-4785.

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